Barangay Casantamarian

Situated in San Quintin, Pangasinan, Barangay Casantamarian is one of 21 barangays that make up the municipality within Ilocos Region.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Casantamarian had a population of 1,967. This made it the 6th largest of 21 barangays in San Quintin by population, placing it in the upper half of the municipality. Residents of Barangay Casantamarian accounted for approximately 5.79% of the total population of San Quintin, which stood at 33,980 in the same census year.

The barangay recorded 1,931 residents in the 2015 intercensal count and 1,967 residents in the 2020 Census — a net change of +1.9%, consistent with a slowly expanding settlement. The Philippine Statistics Authority classifies Barangay Casantamarian as urban, reflecting the density and built-up character of the area.

San Quintin is a municipality comprising 21 barangays, and serves as the governing unit directly responsible for local services in Barangay Casantamarian, including public health, sanitation, peace and order, and civil registration. Within the wider province of Pangasinan, which contains 1,364 barangays across its component cities and municipalities, Barangay Casantamarian ranks 647th by 2020 population. Pangasinan is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Casantamarian is governed by an elected Sangguniang Barangay composed of a Punong Barangay and seven kagawads, with the Sangguniang Kabataan representing the youth. The next BSKE, set for Monday, November 2, 2026, will elect officials to four-year terms as provided under Republic Act No. 12232.